P0112: Intake Air Temperature Circuit Low Input
Can you still drive? Yes, you can drive safely. The engine may run slightly lean, but this is a low-priority repair.
What Does P0112 Mean?
Code P0112 indicates that the intake air temperature sensor is reporting an abnormally high temperature, which corresponds to a low voltage reading from the sensor. This can be caused by a short circuit in the sensor wiring or a failed sensor. The ECU may over-lean the fuel mixture as a result.
Need to read your codes?
An OBD-II scanner lets you read and clear diagnostic trouble codes from your vehicle's computer. Most scanners work with any car made after 1996.
Browse OBD-II Scanners on AmazonCommon Causes
- Shorted IAT sensor wiring
- Faulty IAT sensor
- Corroded connector pins
- IAT sensor located too close to a heat source
Symptoms
- Check engine light on
- Engine running lean
- Rough idle
- Reduced power in some conditions
Diagnostic Steps
- 1Read and document freeze frame data
- 2Check IAT sensor voltage at the connector with key on, engine off
- 3Compare IAT reading to actual ambient temperature
- 4Inspect wiring for shorts to ground
- 5Replace IAT sensor if it reads incorrectly
Recommended Parts & Tools
intake air temperature sensor
electrical connector cleaner
Estimated Repair Cost
| Type | Estimated Cost |
|---|---|
| Total Repair Cost Range | $15 - $150 |
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Frequently Asked Questions
What does low input mean for P0112?
Low input refers to the voltage signal being lower than expected, which the ECU interprets as an excessively high air temperature. This is usually caused by a short circuit or failed sensor.
How much does it cost to fix P0112?
An IAT sensor is one of the cheapest sensors to replace, typically costing $15 to $50 for the part. Labor is minimal since the sensor is usually easily accessible.
Community Fix Reports
Community reports are user-submitted and not verified by Auto AI Buddy. Results may vary.
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